Another lawsuit has been filed against Boeing, alleging the company concealed known design flaws in its 737 MAX aircraft from airlines and the public. Mary Schiavo, the former inspector general for the U.S. Transportation Department, filed the suit on behalf of a passenger who was killed in the March 10 crash of Ethiopian Airlines Flight 302, which killed all 157 people on board. The suit argues the Federal Aviation Administration handed over the bulk of its safety oversight to Boeing, allowing the company to rush through and cut corners on inspecting and certifying its own jets.